Atopy is a predisposition toward developing certain allergic hypersensitivity reactions. Atopy may have a hereditary component, although contact with the allergen or irritant must occur before the hypersensitivity reaction can develop.
As of 2012, 63.9 percent of players playing in Major League Baseball are white. There is no way of telling the exact number due to the number of players.
Quick Answer. As of 2014, a player needs 3.1 bats, or appearances at the plate in each game of the season, to qualify for a Major League Baseball batting title. With a standard season of 162 games, each player vying for the MLB title is required to make 502 plate appearances.